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Citation: Chang Xiao-Yan, Wang Zhi-Xing, Li Xin-Hai, Kuang Qiong, Peng Wen-Jie, Guo Hua-Jun, Zhang Yun-He. Synthesis and Performance of LiMnPO₄ Used as Cathode Material for Lithium Ion Batteries[J]. Acta Physico-Chimica Sinica, ;2004, 20(10): 1249-1252. doi: 10.3866/PKU.WHXB20041017 shu

Synthesis and Performance of LiMnPO₄ Used as Cathode Material for Lithium Ion Batteries

1.
School of Metallurgical Science and Engineering, Central South University, Changsha　410083

Received Date: 26 March 2004
Available Online: 15 October 2004

Olivine LiMnPO4 was synthesized at 600 ℃ and 800 ℃ by the method of solid-state reaction combining with the addition of carbon black and ball-milling of reagents and precursors. Structure, surface morphology and charge/discharge performance of LiMnPO4 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and electrochemical measurement, respectively. Sample synthesized at 600 ℃ by ball-milling of reagents for 24 h and precursors for 12 h contains impurities and large, densely sintered blocks .Pure olivine LiMnPO4 with large particle size is obtained at 800 ℃ by the same ball-milling process. It is shown that these materials can′t charge or discharge effectively in the electrochemical tests. On the contrary, sample prepared at 600 ℃ by ball-milling of reagents for 36 h and precursors for 24 h presents pure phase with small and almost identical particles size (about 100～200 nm). The initial discharge capacity of this sample is approximately 100 mAh•g－1. Mixing of the agents and the precursors and the choice of sintering temperature are two important factors to obtain pure olivine LiMnPO4 with reversible charge-discharge capacity.
- Lithium ion batteries;LiMnPO₄;Olivine;Cathode materials;Synthesis;Electrochemical performance
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沈阳化工大学材料科学与工程学院沈阳 110142

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Synthesis and Performance of LiMnPO4 Used as Cathode Material for Lithium Ion Batteries

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通讯作者: 陈斌, bchen63@163.com

Synthesis and Performance of LiMnPO₄ Used as Cathode Material for Lithium Ion Batteries